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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK12

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.76331704-0.0111612524λ^{2}-0.000129016401λ^{4}+0.0184973677λ^{-2}+0.000256863267λ^{-4}+6.55822525\text{×}10^{-06}λ^{-6}+7.62548252\text{×}10^{-08}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 23.0 °C
coefficients_of_thermal_dispersion: -3.2027e-06 1.0309e-08 -1.46e-12 5.4747e-07 4.6348e-10 0.17237
n_d: 1.677900
V_d: 55.348146
density: 3.78 g/cm3
coefficient_of_thermal_expansion_1: 7.8e-06 K-1
ΔP_gF: -0.0045
phosphate_resistance: 4.0

References

NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Hikari Glass Co., Ltd.

Hikari Glass Co., Ltd. is a Japanese glass maker, a subsidiary of Nikon Corp.

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